Pardon my language, but, how in the fuck would Metroid Prime and Animal a Crossing save a console? That's some poor imagination you have right there.
How about: Super Mario Galaxy 3, Pokemon MMORPG, actually hyping Legend of Zelda?
If third parties aren't off limits. How about making deals for all sorts of exclusive content that people want? They could do a Disney/Nintendo crossover game, a Square/Nintendo crossover RPG as Mario RPG 2, there's an astronomical volume of stuff in the realm of not likely they could do.
Better question is why bother? It would be better to go with a better and more capable console and do everything right on that one instead. The Wii U is too weak to do what Nintendo wants it to do with Miiverse and everything.
I describe myself as a little dose of toxic masculinity.
